(DUBAI, United Arab Emirates) — A U.S. Navy patrol boat fired warning shots Tuesday near an Iranian vessel that American sailors said came dangerously close to them during a tense encounter in the Persian Gulf, the first such incident to happen under President Donald Trump. Iran’s hard-line Revolutionary Guard later blamed the American ship for provoking the situation.

The encounter involving the USS Thunderbolt, a Cyclone-class patrol ship based in Bahrain as part of the U.S. Navy’s 5th Fleet, is the latest confrontation between Iranian vessels and American warships. It comes as Trump already has threatened to renegotiate the nuclear deal struck by his predecessor and after his administration previously put Iran “on notice” over its ballistic missile tests.

The Thunderbolt was taking part in an exercise with American and other coalition vessels in international waters when the Iranian patrol boat approached it, 5th Fleet spokesman Lt. Ian McConnaughey said…